Earplug



FIG. 1 is a perspective view of an earplug showing my new design;

FIG. 2 is a front elevational view thereof, the rear elevational view being a mirror image;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front perspective view of a second embodiment of an earplug showing my new design;

FIG. 6 is a front elevational view thereof, the rear elevational view being a mirror image;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a top plan view thereof. 

The ornamental design for an earplug, as shown and described. 